add setTimeout to google tag manager manually

Question

Loading in Wordpress tag manager, and I want to add a setTimeout to load the script 5 seconds later.

    echo "<script>(function(w, d, s, l, i) {
    w[l] = w[l] || [];
    w[l].push({
        'gtm.start': new Date().getTime(),
        event: 'gtm.js'
    });
    var f = d.getElementsByTagName(s)[0],
        j = d.createElement(s),
        dl = l != 'dataLayer' ? '&l=' + l : '';
    j.async = true;
    j.src =
        'https://www.googletagmanager.com/gtm.js?id=' + i + dl;
    f.parentNode.insertBefore(j, f);
})(window, document, 'script', 'dataLayer', 'GTM-code');</script>";

second part:

<noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-code"
        height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>

Answer 1

Be careful with loading GTM late. If a user visits your site for just a few seconds and then leaves, it is called a "bounce" in Google Analytics. If GTM doesn't load in time to send a page view to Google Analytics, you can have an artificially low bounce rate . You may want to consider other options to whatever problem you're solving before delaying GTM.

Having said that, here's some code that should work. :)

echo "<script>
var loadGtm = function(w, d, s, l, i) {
  w[l] = w[l] || [];
  w[l].push({
    'gtm.start': new Date().getTime(),
    event: 'gtm.js'
  });
  var f = d.getElementsByTagName(s)[0],
      j = d.createElement(s),
      dl = l != 'dataLayer' ? '&l=' + l : '';
  j.async = true;
  j.src = 'https://www.googletagmanager.com/gtm.js?id=' + i + dl;
  f.parentNode.insertBefore(j, f);
}
setTimeout(loadGtm.bind(null, window, document, 'script', 'dataLayer', 'GTM-code'), 5000);
</script>";

As @Eike Pierstorff said, it doesn't make sense to load the noscript tag with setTimeout . If javascript is enabled, that tag won't do anything. If javascript is disabled, the setTimeout won't work so the noscript tag won't get added. I would just add it to the body as-is.